He Must Die—Again!

+4 insight bonus to his AC from the World Engine, which is also granting his unholy aura

In the AP, it lists firearms as using the Guns Everywhere rules in his location, so natives to the area treat them as simple weapons.

Invulnerable, indomitable, inevitable.

Grigori Rasputin CR 17, MR4

XP 102,400
Male Middle-Aged Mesmerist 8/Overwhelming Soul (Telekineticist) 8/Guardian 4
Beyond Morality Medium humanoid (Human, Mythic)
Init +11; Senses true seeing; Perception +15
Aura unholy aura (DC22)

----- Defense -----
AC 26, touch 19, flat-footed 23 (+6 Armor, +2 Deflection, +3 Dexterity, +4 Insight, +1 Natural Armor)
hp 252 (16d8+148+32);
Fort +15, Ref +15, Will +20
Defensive Abilities absorb blow (-20), beyond morality, force ward (8), hard to kill (-50), stitched soul, to the death, towering ego; SR 25 (Good only)
Weaknesses stitched soul

----- Offense -----
Speed 30 ft.
Melee mwk dagger +11/+6/+1 (1d4-2/19-20)
Ranged Telekinetic Blast +17 (4d6+16/x2 or Projectile)
Ranged mwk Nagant M1895 revolver +16/+11/+6 (1d8/x4)
Special Attacks gather power, hypnotic stare (-3, painful stare [+4/+2d6, fatigue DC24], bold stares: disorientation, susceptibility), metakinesis (empower), mythic power (11/day, surge +1d8)

Mesmerist Spells Known (CL 8th; concentration +20)
3rd (4/day) bestow curse, oneiric horror, greater, spite
2nd (6/day) burning gaze, haunting mists, instigate psychic duel, placebo effect
1st (6/day) adoration, charm person, ill omen, hypnotism, murderous command, surge of adrenaline
Knacks—bleed, detect magic, detect psychic significance, read magic , touch of fatigue, unwitting ally

Kineticist Spell-Like Abilities (CL8th; concentration +20; At-will; Expanded Aether)
Blasts—telekinetic blast (0), force blast (2)
Infusions—bowling infusion (2), foe throw (2), force hook (2), pushing infusion (1)
Utility—basic telekinesis, kinetic healer (1), self telekinesis, telekinetic finesse

----- Tactics -----
Before Combat Rasputin observes the PCs at several points during the adventure, as noted. During this time, he applies his mesmerist tricks to allies in the field to aid them from afar. When it comes time for his own fight, he activates his scroll of true seeing using use magic device, drinks his potions, and finally activates his reflection of weakness mesmerist trick on himself. These bonuses are included in his stat block.
During Combat By now, Rasputin has developed a relatively decent understanding of his enemy’s abilities, and uses his spells and kinetic infusions to whittle away at foe’s weaknesses. In particular, he focuses his mind-affecting abilities on foes who’ve shown poor resolve, and his kinetic infusions and foe throw on unsteady targets. When he drops below 0 HP, Rasputin’s mythic abilities allow him to function all the way to -50HP, a time during which he uses instigate psychic duel in an effort to single out a particularly meddlesome target while preserving his ability to act (albeit within a binary mindscape).
Morale On the precipice of claiming his mother’s mythic power, Rasputin relies on his stitched soul to preserve his life, and fights to the death again and again until slain permanently.

----- Statistics -----
Str 7, Dex 16, Con 25, Int 13, Wis 15, Cha 30
Base Atk +12; CMB +10 (+18 when using CMB infusions); CMD 27 Feats Combat Casting, Craft Wondrous Item, Defensive Combat Training, Diehard^B, Fatiguing Stare, Greater Spell Focus: Enchantment, Improved Initiative, Spell Focus: Enchantment, Toughness^M, Weapon Focus: Kinetic Blast^M
Skills Appraise +8, Bluff +29, Diplomacy +23, Escape Artist +14, Intimidate +23, Knowledge (arcana) +12, Knowledge (nobility) +6, Knowledge (planes) +9, Knowledge (religion) +8, Heal +12, Linguistics +8, Perception +15, Sense Motive +16, Sleight of Hand +7, Spellcraft +13, Use Magic Device +23
Languages Aklo, Celestial, Church Slavonic, Common, Russian, Latin
SQ amazing initiative (+4), consummate liar, display of charisma, display of constitution, elemental focus: aether, infusion specialization (2), mental potency (+1), mental prowess (1/day), mesmerist tricks (12/day. DC24, [manifold tricks: 2], gift of will, meek façade [+3], psychosomatic surge [1d8+4], reflection of weakness, shadow splinter [7]), mind over matter, overwhelming power (+2), recuperation, touch treatment (11/day. Confused, dazed, fascinated, frightened, sickened, shaken)
Gear mwk dagger, mwk Nagant M1895 revolver with 21 metal cartridges,+2 glamered mithral chain shirt (Cossack Garb), amulet of natural armor +1, belt of physical might +4 (Dex, Con), crystal ball, headband of mental prowess +4 (Wis, Cha), muleback cords, potions of bear’s endurance, eagle’s splendor, and shield ; ring of protection +2, scrolls of antilife shell and true seeing

----- Special Abilities -----
Stitched Soul (su) Rasputin’s soul is stitched to his body with threads of fate, and he clings tenaciously to life. He gains Diehard as a bonus feat. In addition, when first reduced to a number of negative hit points equal to or greater than his current Con score, Rasputin dies, but he springs back to life 1d4 rounds later as if the target of a resurrection spell. If killed a second time, the Mad Monk again comes back to life 1d6 rounds later, as if the target of a raise dead spell (upon his return, he loses 50% of his remaining unused spell slots as if they had been used to cast spells). Only after Rasputin is slain for a third time do his soul’s stitches finally unravel from his corpse, releasing his malignant spirit into the ether.

1. This Rasputin is built with the overwhelming soul kineticist archetype, mesmerist, and guardian mythic path. Mesmerist is a no-brainer for Rasputin’s formidable personality and deception, while the overwhelming soul archetype allows him to express his formidable personality; to the point that he can use some semblance of the ectoplasmic features of the occult oracle mystery as part of his original build, and focus his mesmerist talents on utility effects rather than direct damage.
2. Although, in the AP, he’s in the process of stealing Baba Yaga’s mythic power, this represents some degree of siphoning having already been completed, and most importantly gives him a few neat tricks up his sleeve in the form of a mythic power reservoir, a higher initiative, and access to incredible durability and mythic toughness/weapon focus, as well as the mythic display options for both constitution and charisma. Beyond Morality rounds out his mythic path abilities to play up Rasputin’s incongruence.
3. Overall, this occult version of Rasputin focuses more greatly on supplying his allies before combat with mesmerist tricks, and using his illusions to whittle away at his foes before they ever arrive in the Chapel. When the PCs do confront him for the final battle, his soul-stitched ability and incredible survivability ensure a truly epic experience in having to actually kill the man who survived so much in our Earth. When possible, he uses his infusions and stare abilities to make enemies vulnerable to the allies he’s cultivated in the meantime.
4. Rasputin’s knacks exclude detect poison because he normally just tanks it; after all, on Earth, there’s very few fort saves he’s going to fail, and it gives the Russian nobility quite the scare as a benefit. The rest of his knacks are his go-to spells for Earth as they’re practical and also effective against non-adventurers.
5. His first level spells are all utility powers to further his schemes. Ill omen is a great spontaneous spell for him, as it scales with his caster level and offers no save, increasing the efficiency of his other compulsions or forcing enemies attempt to strike him to fumble. Surge of adrenaline, in conjunction with his mythic display abilities, can account for some of his more tremendous practical feats of survival and resilience.
6. Hypnotism and kinetic healing allow him to perform some of the various “miracles” he’s remembered for on earth, as well as his touch treatments, psychosomatic surge, and gift of will abilities. While most of the abilities are temporary, they certainly are effective boons for his allies.
7. Rasputin’s second level spells are a combination of effective tools for aiding his allies as well as ensnaring the mines of his enemies. Instigate psychic duel in particular is useful when Rasputin is below 0HP, as it allows him to act normally against a single target and destroy them from within. It isn’t quite the occult mystery’s magic jar, but it serves a similar practical function.
8. His third level spells are all combat based, given that if someone is capable of resisting his formidable powers, he needs a more direct means to destroy them. Given his predilection for spying on his foes at numerous points during the adventure, and the general player reaction of seeing their own spells turned against them, he particularly enjoys using spite and greater oneiric horror in tandem to frustrate them, while bestow curse can dramatically reduce a foe’s ability to fight back.
9. I wasn’t quite sure how to lay out Rasputin’s kineticist abilities, since they scale. I grouped them by blast, utility, and infusion for ease of reference. The bracketed number refers to the burn cost associated, while elements are listed in the concentration stat line. Telekineticists gain two very useful traits which mimic occult mystery abilities: force ward and force blast, the latter of which replaces Rasputin’s ectoplasmic spell feat in the original. His other abilities, in addition to the psychic skill unlocks, can account for some of his more mundane mysticism rather than the overt magic he’s capable of as an oracle.

Grigori Rasputin CR 17

XP 102,400
Male middle-aged human mesmerist 18
NE Medium humanoid (human)
Init +0; Senses True Seeing; Perception +18
Aura unholy aura (DC 22)

----- Defense -----
AC 25, touch 21, flat-footed 25 (+4 armor, +3 deflection, +4 insight, +4 natural)
hp 192 (18d8+108)
Fort +12, Ref +13, Will +24
Defensive Abilities stitched soul, towering ego +8; SR 25 vs. good

----- Offense -----
Speed 30 ft.
Melee mwk dagger +13/+8/+3 (1d4–1/19–20)
Ranged mwk Nagant M1895 revolver +14/+9/+4 (1d8/×4)
Special Attacks hypnotic stare (-3, 30 feet), painful stare (+6d6+9)
Mesmerist Spells Known (CL 18th; concentration +28)
6th (4/day)—euphoric tranquility (DC 25), insanity (DC 25), true seeing, waves of ecstasy (DC 25)
5th (5/day)—mind fog (DC 24), primal regression (DC 24), mass synesthesia (DC 23), waves of fatigue
4th (7/day)—dimension door, dominate person (DC 23), enervation, greater forbid action (DC 23), freedom of movement
3rd (7/day)—bestow curse (DC 21), clairaudience/clairvoyance, confusion (DC 22), dispel magic, fear (DC 21), scrying (DC 21)
2nd (7/day)—enthrall (DC 21), hold person (DC 21), inflict pain (DC 21), levitate, silence (DC 20), suggestion (DC 21)
1st (7/day)—adoration, command (DC 20), innocence, murderous command (DC 20), remove sickness (DC 19), unnatural lust (DC 20)
0 (at will)—bleed (DC 18), detect magic, detect poison, light, message, read magic

----- Tactics -----
Before Combat Within the Thrice-Tenth presbytery (area H6), Rasputin enjoys the benefits of the World Engine’s unholy aura and insight bonus to his AC. When faced with combat, Rasputin casts freedom of movement, levitate, and true seeing. Additionally, Rasputin implants spell anticipation on himself to cast insanity if he is targeted by enemy spellcasters.
During Combat Rasputin attempts to control the nearest opponent with dominate person, then harries his opponents with his hypnotic stare and effects such as waves of ecstasy, greater forbid action, euphoric tranquility, and quickened hold person. Rasputin targets opponents that resist his powers with enervation and mind fog to soften them up. If confident in his control of the situation, Rasputin implants a new trick on himself, preferring cursed sanction or greater mask misery, then fires his mwk Nagant M1895 revolver at the target of his hypnotic stare on subsequent rounds, using painful stare on the first attack that hits each round.
Morale On the precipice of claiming his mother’s mythic power, Rasputin relies on his stitched soul to preserve his life, and fights to the death again and again until slain permanently.

----- Statistics -----
Str 9, Dex 11, Con 19, Int 14, Wis 17, Cha 26
Base Atk +13; CMB +12; CMD 25
Feats Combat Casting, Diehard^B, Great Fortitude, Iron Will, Lightning Reflexes, Logical Spell, Persuasive, Quicken Spell, Spell Focus (Enchantment) Toughness, Uncanny Concentration
Skills Bluff +38, Diplomacy +33, Intimidate +27, Knowledge (arcana) +17, Knowledge (nobility) +23, Knowledge (planes) +14, Knowledge (religion) +17, Perception +18, Sense Motive +24, Spellcraft +17, Use Magic Device +29
Languages Church Slavonic, Common, Russian
SQ bold stares (allure, sapped magic, susceptability, timidity), glib lie, hypnotic stare (-3, 30 feet), mental potency, mesmerist tricks (280 feet), mesmerist tricks (compel alacrity, cursed sanction, faked death, greater mask misery, mask misery, mesmeric mirror, misdirection, psychosomatic surge, spell anticipation, vision of blood), painful stare (+6d6+9), touch treatment, towering ego +8

----- Special Abilities -----
Stitched Soul (Su) Rasputin’s soul is stitched to his body with threads of fate, and he clings tenaciously to life. He gains Diehard as a bonus feat. In addition, when first reduced to a number of negative hit points equal to or greater than his current Con score, Rasputin dies, but he springs back to life 1d4 rounds later as if the target of a resurrection spell. If killed a second time, the Mad Monk again comes back to life 1d6 rounds later, as if the target of a raise dead spell (upon his return, he loses 50% of his remaining unused spell slots as if they had been used to cast spells). Only after Rasputin is slain for a third time do his soul’s stitches finally unravel from his corpse, releasing his malignant spirit into the ether.

Grigori Rasputin CR 17

XP 102,400
Male middle-aged human medium (reanimated medium) 18 (Pathfinder RPG Occult Adventures pg 30, 93)
NE Medium humanoid (human)
Init +4; Senses true seeing; Perception +24
Aura unholy aura (Fort DC 22)

----- Defense -----
AC 22, touch 22, flat-footed 22 (+4 deflection, +4 insight, +4 luck [touch only], +4 natural)
hp 183 (18d8+90)
Fort +16, Ref +12, Will +20
Defensive Abilities stitched soul; Immune possession, death effects, and negative energy; SR 25 vs. good
Weaknesses influence penalty (-6 on all Charisma checks and Charisma-based skill checks involving worshipers of faith other than the heirophant spirit's, except checks to convert)

----- Offense -----
Speed 30 ft.
Melee mwk dagger +13/+8/+3 (1d4–1/19–20)
Ranged mwk Nagant M1895 revolver +14/+9/+4 (1d8/×4) or channel ray +13 touch 9d6 negative energy (Will DC 29 half)
Special Attacks ease passage, channel negative energy 9/day (Will DC 27, 9d6), shared séance, sudden strike
Medium Spells Known (CL 18th; concentration +24)
6th (4/day) – antilife shell*, mass inflict moderate wounds* (Will DC 24, half)
5th (5/day) – flame strike* (Ref DC 23), mass inflict light wounds* (Will DC 23, half)
4th (7/day) – dismissal, inflict critical wounds* (Will DC 22, half), remote viewing, spiritual ally, summon monster V, true seeing, unholy blight* (Will DC 22)
3rd (7/day) – adjustable disguise, aura alteration (Will DC 21), call spirit (Will DC 21), inflict serious wounds* (Will DC 21, half), mindscape door (Will DC 21), searing light*, thaumaturgic circle, vampiric touch
2nd (7/day) – analyze aura (Will DC 20), death knell* (Will DC 20 negates), greater oneiric horror (Will DC 20), inflict moderate wounds* (Will DC 20, half), placebo effect (Will DC 20), purge spirit (Will DC 21), sessile spirit (Will DC 20), spectral hand
1st (7/day) – calm spirit (Will DC 19), charge object, comprehend languages, heightened awareness, inflict light wounds* (Will DC 20, half), murderous command* (Will DC 19), psychic reading, quintessence (Will DC 20)
0 (at will) – bleed* (Will DC 18), detect magic, detect psychic significance, ghost sound, light, mage hand, read magic
* treated as divine magic

----- Tactics -----
Before Combat Within the Thrice-Tenth presbytery (area H6), Rasputin enjoys the benefits of the World Engine's unholy aura and insight bonus to his AC. He channels a hierophant spirit through a séance. When faced with combat, Rasputin casts spiritual ally, true seeing and activates trance of three to allow his champion spirit to enter him as a secondary spirit. Once enemies are in sight, he casts antilife shell and spectral hand to enable him to use touch attacks beyond the field's perimeter.
During Combat Under the protection of his antilife shell, Rasputin attempts to hinder his opponents with greater oneiric horror and spiritual ally and turn foes against each other with murderous command before laying waste with such deadly effects as channeled negative energy rays, flame strike and unholy blight. Those that engage him in melee combat find him to be a cagey fighter, taking full advantage of any Strength damage incurred when attacked by good creatures and the champion's sudden attack spirit power.
Morale On the precipice of claiming his mother’s mythic power, Rasputin relies on his stitched soul to preserve his life, and fights to the death again and again until slain permanently.

----- Statistics -----
Str 9, Dex 11, Con 19, Int 14, Wis 17, Cha 26
Base Atk +13; CMB +12; CMD 30
Feats Channel Ray, Combat Casting, Diehard^B, Improved Channel, Improved Initiative, Iron Will, Great Fortitude, Lightning Reflexes, Logical Spell, Spirit Focus (Hierophant), Toughness^B
Skills Bluff +20, Diplomacy +29, Intimidate +20, Knowledge (arcana) +14, Knowledge (nobility) +20, Knowledge (planes) +14, Knowledge (religion) +23, Perception +24, Sense Motive +24, Spellcraft +14, Use Magic Device +20
Languages Church Slavonic, Common, Russian
SQ ask the spirit, astral journey, channel self (hierophant), lingering spirit, nothing is taboo, propitiation, spirit bonus +6 (Wisdom checks, Wisdom-based skill checks, and Will saves), spirit mastery, spirit surge 3/day (1d8), spirit warding, trance of three (champion)
Gear mwk dagger, mwk Nagant M1895 revolver with 21 metal cartridges, amulet of natural armor +4, belt of physical perfection +2, cassock of the Black Monk, headband of mental prowess +4 (Wis, Cha)

----- Cassock of the Black Monk -----
Aura strong transmutation; CL 12th
Slot body; Price 34,000 gp; Weight 1 lb.
Description
This ankle-length black robe, cut in the style favored by Orthodox priests, bears little outward ornamentation beyond its gold buttons, though subtle occult symbols embroidered in black thread decorate the skirt's hem. The cassock of the Black Monk grants a +4 luck bonus to the wearer’s touch AC. In addition, while wearing the cassock, a medium channeling the Hierophant spirit gains access to spirit mastery (Pathfinder RPG Occult Adventures 33) and may use it as if he had it as a normal class feature. If the wearer already has spirit mastery, he can use spirit surge one additional time per day. This ability has no effect if worn by a non-medium. If the wearer is a medium but is not channeling a hierophant spirit, once per day he can cast a spell with the Intuitive Spell feat (Pathfinder RPG Occult Adventures 136) as a standard action that does not increase the level of the spell. This ability has no effect if the wearer is a non-oracle.
Construction
Requirements Craft Wondrous Item, divine favor, enshroud thoughts; Cost 17,000 gp

----- Special Abilities -----
Ask the Spirits (Sp) Rasputin can send his consciousness to the Astral Plane any number of times to ask the spirits for advice, as if using contact other plane to contact the Astral Plane. He automatically succeeds on the Intelligence check to avoid the decrease to his Intelligence and Charisma.

Astral Conduit (Su) Rasputin can enter a deep coma in order to project himself on the Astral Plane as astral projection, except he can project only himself, he can't enter other planes, and his projected gear has no magical properties.

Channel Self (Su) Rasputin is essentially a bodiless spirit using influence to possess his own spiritless body. The more influence Rasputin has over his body, the more powerful he becomes.
Each day he can perform a séance at a location as normal to focus on one of his potential future legends. Séances take 1 hour to perform and require his concentration. At the end of a séance, Rasputin channels that legendary potential as strongly as possible into his body to serve as his spirit for the day. He gains the spirit's listed séance boon, lesser spirit power, intermediate spirit power, greater spirit power, and supreme spirit power. After 24 hours, Rasputin loses contact with his spirit's potential legend and can perform another séance. The spirit gains 3 points of influence over his body, to a maximum of 6 points. Since he is possessing his own body, Rasputin doesn't lose control at 5 or more points of influence, though he still suffers the legend's influence penalty as normal at 3 or more points of influence. All effects and abilities that normally increase or decrease (such as spirit surge or spirit powers) have the opposite effect on Rasputin; this does not apply to the abilities of the reanimated medium archetype. He cannot choose to channel a weaker spirit to avoid losing influence from using spirit surge. Rasputin's body enters a deathlike coma should he reach 0 points of influence and he is helpless for 24 hours, after which he reverts to 1 point of influence if the body is still alive, but can't perform another séance for 24 hours.

Ease Passage (Su) As long as his body is intact, it's easy for Rasputin to return to it. He takes only 1 negative level instead of 2 from raise dead.

Lingering Spirit (Su) Rasputin's spirit lingers for up to 1 round after death before departing if he spends 1 point of influence. If he died of hit point damage, healing works on his body during the intervening round and can bring him back to life. Once the spirit departs, the breath of life spell continues to work for 1 additional round, even though Rasputin has been dead for more than 1 round.

Nothing Is Taboo (Ex) Unlike other mediums, Rasputin does not possess the taboo class feature.

Propitiation (Su) Rasputin has learned hidden techniques and rites that allow him to mollify his channeled spirit once per day, increasing its influence over him by 1 point (to a maximum of 6 points of influence).

Overflowing Grace (Greater, Su): When Rasputin heals a creature to full hit points or a creature already at full hit points with his negative energy, that creature gains a +1 profane bonus on attack rolls, skill checks, ability checks, and saving throws for 1 round.

Shared Séance (Su) Rasputin can request his allies to be present for his séance. A character counts as present so long as he maintains physical contact with another present character and willfully opens himself to the spirit; he can take other actions during this time. All present allies gain the channeled spirit's séance boon for 24 hours.

Spirit Bonus (Su) When Rasputin channels his hierophant spirit, he gains a +5 bonus on Wisdom checks, Wisdom-based skill checks, and Will saves.

Spirit Mastery (Ex) Rasputin is a legend among spirits, particularly lesser spirits. He can use his spirit surge ability an additional two times per day to reduce his spirit's influence over him.

Spirit Surge (Su) After failing a d20 roll that was modified by his spirit bonus, Rasputin can reduce his spirit's influence by 1 point in order to add 1d8 to check's result without taking an action. This can cause the check to succeed instead of fail. He must be conscious and aware to use this ability, and Rasputin can use this ability at most once per round.

Spirit Warding (Su) Rasputin can ward himself from other spirits and the grave's call. He is immune to possession, death effects, and negative energy.

Stitched Soul (Su) Rasputin's soul is stitched to his body with threads of fate, and he clings tenaciously to life. He gains Diehard as a bonus feat. In addition, when first reduced to a number of hit points equal to or greater than his current Constitution score, Rasputin dies, but he springs back to life 1d4 rounds later as if the target of a resurrection spell. If killed a second time, the Mad Monk again comes back to life 1d6 rounds later, as if the target of a raise dead spell (upon his return, he loses 50% of his remaining spell slots as if they had been used to cast spells). Only after Rasputin is slain for a third time do his soul's stitches finally unravel from his corpse, releasing his malignant spirit into the ether.

Sudden Attack (Intermediate, Su): Whenever Rasputin takes a full-attack action, he gains one additional attack at his highest base attack bonus. This ability stacks with the extra attack from haste, but it doesn't stack with special actions that grant extra attacks, such as flurry of blows or spell combat. Sudden attack works as normal with full-attack options such as two-weapon fighting.

Trance of Three (Su) Rasputin can reduce his spirit's influence over him by 1 point in order to allow a portion of his legendary spirit from another potential legend to enter him for 19 rounds, granting him the intermediate spirit power from another legend. If that power has limited number of uses per day, he must keep track of the remaining uses even after the secondary spirit is gone; if Rasputin calls the secondary spirit again that day, it can grant the remaining uses of that power. If he uses an ability that incurs influence, it actually reduces that amount of influence over his primary spirit, not the secondary spirit. Rasputin doesn't gain the benefits of his spirit bonus from the secondary spirit. He can end the trance of three early as a free action.

I was looking at making him a mesmerist, and given pictures of him, it would be a natural way to go. But, in the end, I decided to emphasize his role as an occult consultant to the Romanovs for the purposes of my game and so he became a medium. The reincarnated archetype was gravy on an already awesome meal, even though its lingering spirit ability has a weird interaction with stitched soul. The hardest part was coming up with a psychic equivalent of the cassock, as I'm usually not that great with designing magic items.
Edit: Removed the +10 armor from the occult mystery's ectoplasmic armor revelation and added two spirit powers.

Raw power inherited from his mother, Baba Yaga. Yes, her.